TH15810Y - The process of extracting pigments from teak leaves by fermentation with a single solvent. - Google Patents

Abstract

Page 1 of 1. Summary of the Invention: This document describes the process of extracting pigments from teak leaves using a single solvent fermentation method. It begins with harvesting teak leaves by pruning the lower branches of the trunk and selecting fully grown leaves. These leaves are then dried at 50-60 degrees Celsius for 24 hours. The leaves are then ground into a powder and extracted using a single solvent fermentation method. The solvents used include hexane, ethyl acetate, methanol, water, a water-methanol mixture in a ratio of 1:0.25-5 parts, and a water-ethanol mixture in a ratio of 1:0.25-5 parts. The ratio is 1 kilogram of dry teak leaf powder to 5-20 liters of solvent. The extract is filtered to obtain a clear liquid, which is then dried. This extracted pigment is then used to produce natural dyes from teak leaves. The resulting pigments will have several shades, including orange, brown, and brownish-orange. Reddish brown and brownish red.

Claims (2)

Revised 17/10/2018. Claims 1. The process of extracting pigments from teak leaves using a single-solvent fermentation method consists of the following steps: a. Teak leaf harvesting: Teak leaves are harvested by pruning branches at the lower part of the trunk (1/3 of the trunk height). b. Teak leaf powder preparation: Teak leaves are washed and cleaned, then dried in the dark at 50-60 degrees Celsius for 24 hours. The leaves are then ground into powder. c. Pigment extraction from teak leaf powder: A ratio of 1 kilogram of dry teak leaf powder to 5-20 liters of solvent is used, and the mixture is fermented for 2-7 days. The resulting powder is then extracted using the single-solvent fermentation method. Using solvents such as hexane, ethyl acetate, methanol, water, a water-methanol mixture in a ratio of 1:0.25 - 5 parts, or a water-ethanol mixture in a ratio of 1:0.25 - 5 parts. d. Filtering the color extract obtained from step c to obtain a clear extract. e. Re-extracting the remaining teak leaf powder from step d according to step c. Filter out the residue and combine the extract obtained in this step with the color extract obtained from step d. f. Drying the color extract obtained from step (e). If the solvent is hexane, ethyl acetate, or methanol, evaporate the solvent from the color extract using a vacuum distillation apparatus (rotary evaporator) and place it on a temperature-controlled water bath. If the solvent is a water-methanol mixture or a water-ethanol mixture, evaporate the solvent from the color extract using a vacuum distillation apparatus. and dried into a powder using a freeze dryer. In the case of aqueous solvent, it is dried into a powder using a freeze dryer. 2. The process of extracting pigments from teak leaves using the fermentation method with a single solvent, as per claim 1, where the teak leaves are obtained by selecting young teak leaves that are light green with a reddish-brown tint, and mature teak leaves that are dark green and have soft hairs on the underside. ---------- Page 1 of 1 page Claims 1. The process of extracting pigments from teak leaves using the single-solvent fermentation method consists of the following steps: a. Leaf harvesting: Harvest teak leaves by pruning the lower branches of the trunk (1/3 of the trunk height). Select young leaves that are light green with a reddish-brown tint, and mature leaves that are dark green and have soft hairs on the underside. b. Powder preparation: Wash the teak leaves thoroughly, dry them in the dark at 50-60 degrees Celsius for 24 hours, and then grind them into a powder. c. Pigment extraction: Use a ratio of 1 kilogram of dry teak leaf powder to 5-20 liters of solvent, and ferment for 2-7 days. Extract the pigments from the teak leaf powder using the single-solvent fermentation method. Using solvents such as hexane, ethyl acetate, methanol, water, a water-methanol mixture in a ratio of 1:0.25 - 5 parts, or a water-ethanol mixture in a ratio of 1:0.25 - 5 parts. d. Filtering the color extract obtained from step c to obtain a clear extract. e. Re-extracting the remaining teak leaf powder from step d according to step c. Filter out the residue and combine the extract obtained in this step with the color extract obtained from step d. f. Drying the color extract obtained from step (e). If the solvent is hexane, ethyl acetate, or methanol, evaporate the solvent from the color extract using a vacuum distillation apparatus (rotary evaporator) and place it on a temperature-controlled water bath. If the solvent is a water-methanol mixture or a water-ethanol mixture, evaporate the solvent from the color extract using a vacuum distillation apparatus. And it is dried into a powder using a freeze dryer. In the case of a water-based solvent, it is dried into a powder using a freeze dryer. 2. The process of extracting pigments from teak leaves using a single solvent fermentation method, as per claim 1, where the teak leaves are selected from young leaves that are light green with a reddish-brown tint, and from mature teak leaves that are dark green and have soft hairs on the underside.